Gas-screen.



No. 654,9!2. Patented july 3|', |900.

C. J. MURPHY'.`

GAS SCREEN..

(Applicaeio med 1:e. 23,x 1899.)

(No Modal.)

@mgm d atfozneg l l, 1

l UNITED STATES PATENT OFFICE.

CHARLES J. MURPHY, ANNAPOLIS, MARYLAND.

GAS-SCREEN.

SPECIFICATION forming part of Letters Patent No. 654,912, dated July 31 1900. Application filed December 23, 1899 Serial No, 741,452. (No model.)

To all whom t may concern:

Be it known that I, CHARLES J. MURPHY, a citizen of the United States, residing vat An-` resulting from the combustion of the fuel will be prevented from entering the room; but cool air will be admitted into the combustioncharnber or fire-pot to retard a complete combustion of the fuel, as will be presently explained. Vj

As is well known, when the door adjacent the fire-pot is closed a more perfect draft is introduced throughthe fuel than when it is open. Recognizing this fact, it is. the usual practice to leave the above-referredfto door open for predetermined periods, such as during the hours of slumber or when it is not desirable to have the room heated. As a result the cool air passing over the coal and up through the fines retards the combustion, and a saving of the coal is thus effected. However, in actual practice it has been found that upon replenishing the supply of fuelA a certain amount of gas is given off by the coal, which has a tendency to find its way into the room with the obvious disadvantages. The air entering the space between the two wire-ganzes becomes heated and subdivided into numer ous minute jets corresponding with the meshes in the inner gauze. These jets intermingle with the smoke and gases arising from the fuel and diffuse' oxygen` therethrough, thus ignitin g and consumingthe gases before they escape to the smoke-pipe:` By the use of my invention Iv obtain .a twofold advantage-the combustion of the fuel is retarded, and the gas is confined within the stove or passes off through the chimney.

In order to clearly understand the construction and operation of my invention, reference should be had to the accompanying drawings, in whichi Figure 1 is a perspective view of a stove of preferred form, showing my invention attached. Fig. 2 is a perspective viewof the screen det-ached from the stove, and Fig. 3 is -arear elevation of the same.

Referring now specifically to the several parts by reference-numerals, 5 indicates a metal frame of approximately the size and shape of opening of the stove 7. Secured to this frame is a wire mesh of suitable fineness, while to one edge of the frame are hooks 8 and 9, adapted to tit over the hinges of the door 10, and from the opposite edge projects a lug or bolt ll to engage with the latch-strike l2, whereby the screen is held in place. The

.portion above described is secured on the outside of the stove, and a second member 13 is secured to the frame 5 and spaced apart therefrom by bolts 14. The second member also consists of a frame and mesh similar to the one already described, but rests inside the stove. By this arrangement the stove can be replenished with fuel just before retiring, and the circulation of air between the twowireganzes will confine the gas to the interior of the stove and at the same time .permit a free circulation of cool air to pass over the bed of coal in the fire-pot to retard the combustion of the fuel to the desired degree and carry the obnoxious gas off through the chimney along with the products of combustion. As soon as it is found-desirable to accelerate the action of the tire it is obvious that the screen .can be removed and the door closed, when the draft 'will pass through the coals from below the grate, as above described, and with the obvious resulting eect.

What l claim as my invention, and desire to secure by Letters Patent, is-

In a gas-screen for stoves, the combination with a substantially-rectangular frame and a wire mesh carried thereby, of hooks on one edge of said frameadapted to fit over the hinges of the stove-door to detachably secure the screen in place, asecond parallel frame and mesh secured to and carried by the firstmentioned frame and adapted to rest within the stove substantially as described.

In testimony whereof l aix my signature in presence of two witnesses.

CHARLES` J. MURPHY. Witnesses:

E. CLAYTON, L. D. GAssAwAY. 

